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Delish Mexican Casserole with White Sauce

Delish Mexican Casserole with White Sauce

A cozy, layered Mexican-style casserole with tender chicken, tortillas, and a creamy green chile white sauce. Bubbly cheese on top seals the deal.
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Prep Time: 25 minutes
Cook Time: 35 minutes
Total Time: 1 hour
Servings: 8

Ingredients
 

Main Ingredients

  • 24 oz cooked shredded chicken rotisserie works great
  • 4 tbsp unsalted butter
  • 1 cup yellow onion, finely diced
  • 2 tsp minced garlic
  • 3 tbsp all-purpose flour
  • 2 cup low-sodium chicken broth warm
  • 1.5 cup sour cream full-fat preferred
  • 4 oz diced green chiles, drained
  • 1.5 tsp ground cumin
  • 1 tsp chili powder
  • 1.25 tsp kosher salt to taste
  • 0.5 tsp black pepper
  • 1 tbsp fresh lime juice
  • 12 oz flour tortillas, cut into strips 6-inch tortillas
  • 1 cup frozen corn, thawed or canned, drained
  • 1 cup black beans, rinsed and drained optional
  • 8 oz Monterey Jack cheese, shredded
  • 4 oz cheddar cheese, shredded
  • 0.25 cup fresh cilantro, chopped for garnish

Instructions

Preparation Steps

  • Heat oven to 375°F. Lightly grease a 9x13-inch baking dish.
  • Melt butter in a large saucepan over medium heat. Soften onion for 4–5 minutes; stir in garlic for 30 seconds.
  • Sprinkle in flour and cook, stirring, for 1 minute to form a blond roux.
  • Whisk in warm broth gradually. Simmer, whisking, until slightly thickened, 3–4 minutes.
  • Remove from heat. Stir in sour cream, green chiles, cumin, chili powder, salt, pepper, and lime juice.
  • Toss shredded chicken with about 1 cup of the white sauce; set aside.
  • Spread 1/2 cup sauce in the dish. Layer half the tortilla strips, half the chicken, half the corn and beans, and one-third of the cheeses. Spoon over more sauce.
  • Repeat layers with remaining tortillas, chicken, corn, and beans. Top with remaining sauce and the rest of the cheeses.
  • Cover with foil and bake for 20 minutes. Uncover and bake 10–15 minutes more until bubbling and lightly browned.
  • Rest 10 minutes before cutting. Sprinkle with cilantro and serve.

Notes

Variation: Swap in cooked ground turkey or shredded pork. For heat, add sliced jalapeños between layers. To make ahead, assemble, cover, and refrigerate up to 24 hours; add 5–10 minutes to bake time. Leftovers reheat well and freeze up to 2 months.
This recipe is an original creation inspired by classic Delish Mexican Casserole with White Sauce flavors. All ingredient ratios and instructions are independently developed.